html {
  width: 1600px;
}
html body {
  width: 100%;
  background-color: #000;
}
html body .mine {
  width: 50px;
  height: 50px;
  background: url("../images/我方坦克.png");
  background-size: 100% 100%;
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translate(-50%, 0);
}
html body .enemy {
  width: 50px;
  height: 50px;
  background: url("../images/敌军坦克.png");
  background-size: 100% 100%;
  position: absolute;
  top: 0;
  left: 0;
}
html body .pd {
  position: absolute;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background-color: #fff;
}
html body .reset {
  position: absolute;
  top: 20px;
  right: 40px;
}
